Prison Break, Season 1

Michael:
They didn't even let her testify.

Lincoln:
Who?

Michael:
Leticia Berris, and that cop changed his story a dozen times.

Lincoln:
What part of move on don't you get?

Michael:
After Mom died, when it was just you and me, I remember having trouble sleeping, never knowing where you were, but when I'd wake up in the morning there'd be this paper bird, an origami crane sitting next to my bed and I never knew what it meant exactly, but I figured it was your way of letting me know you were checking in on me. Anyway... I looked it up, the crane, stands for familial obligation, watching out for your own. Maybe it's my turn to watch out for you.